Aim:Lenke type-1, primary main thoracic curve pattern, is the most common spinal deformity pattern in adolescent idiopathic scoliosis (AIS). Posterior spinal fusion with all screw instrumentation or hybrid type instrumentation has been shown to achieve reliable deformity correction. The aim of this study is to compare deformity correction success of segmental pedicle screw and hybrid instrumentation for the treatment of Lenke type-1 AIS curves.Material and Methods:Surgically treated Lenke type-1 scoliosis patients were retrospectively evaluated and data of 26 patients that treated with hybrid instrumentation were included into first group. In this group, all patients had been operated with hooks at thoracic part and transpedicular screws at lumbar part. Second group are formed with 26 patients that operated with all segment transpedicular screws. Cobb angles of curves, flexibility, apical vertebral translation (AVT), coronal body balance, kyphosis and lordosis were measured. All measurements and correction ratios are compared between groups.Results:There were no significant differences between two groups at preoperative thoracic and lumbar Cobb angles, thoracic and lumbar curve flexibility, coronal balance, AVT, kyphosis and lordosis. However, a postoperative thoracic correction ratio was significantly different between two groups.Conclusion:Segmental screw instrumentation had better results on thoracic curve correction than hybrid instrumentation for treatment of Lenke type-1 curves. Good results may be achieved with both techniques to provide sagittal balance.